2. Brian Moser - Ice Truck Killer (Season One)
How Dexter must be wishing hed joined forces with this guy now. Brian Moser, better known as The Ice Truck Killer, was the main antagonist in the first season of Dexter and is still one of the most memorable. Through out Season One Moser was sending Dexter cryptic messages, a trail of bread crums leading up to the big reveal. Brian was Dexters biological brother. Separated at birth by Harry because he believed that Brian may well be too damaged it turns out they had both ended up following similar paths with one big exception, Harrys code. Rather than killing for a purpose Brian seemingly killed for the fun of it. As Season one drew to an end Brian tried to convince Dexter to join forces with him by asking him to help him Deb. After much deliberation Dexter finally overthrew Brian, killing him and then staging his suicide. Brian was to return briefly in Season Six, where for one episode only he replaced Harry Morgan as Dexters dark passenger. I for one wouldnt be too disappointed if we got to see him one last time in the final season.
Defining Moment: Asking Deb to marry him only to knock her unconscious and then attempt to kill her using Dexters techniques.